alt Hacker NewsPretty sure Adam Smith captured that in his writings.
Full laissez-faire, free market capitalism generally leads to wealth (and power) imbalance. Regulation is necessary to prevent that (assuming you want to maintain a "fair" democracy of sorts and not regress to oligarchy).
I can't see any system where people are treated fairly (equally and able to reap benefits of their labor aka not slaves) that won't lead to inequality. People are just different, and will have different production rates.